EN
- Overview
- Specifications
- Description
- Applications
- General notes
- FAQ
- Recommended Products
Overview
Place of Origin: |
Sweden |
Brand Name: |
ABB |
Model Number: |
NDBU-85C |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
5-7 days |
Payment Terms: |
T/T |
Supply Ability: |
In stock |
Specifications
|
Product Name: |
Branching Unit |
|
Model: |
NDBU-85C |
|
Dimensions: |
26.3 x 9.5 x 5.5 cm |
|
Weight: |
0.95 kg |
|
Number of Connections: |
9 outputs (8 × 5 Mbit/s, 1 × 10 Mbit/s) |
|
Channels: |
8 followers + 1 master |
|
Data Rate: |
Supports 5 Mbit/s and 10 Mbit/s (configurable) |
|
Optical Cable Type: |
POF (5 Mbit/s) or HCS (10 Mbit/s), mixing not supported |
|
Power Supply: |
24 V DC ±10%, internally fused, galvanically isolated |
|
Mounting: |
DIN rail mount with spring-loaded fasteners |
|
Housing: |
Ventilated design with cooling slots |
Description
The NDBU-85C is a robust DDCS (Distributed Drive Control System) Branching Unit, designed to manage and distribute digital communication signals in optical networks—most commonly within ABB's ACS800, DCS800-S0, or DCS800-EP environments. It offers 8 follower channels plus one master channel, enabling flexible, star or tree network configurations for reliable communication.
Applications
Paper and printing plants: Used for precise speed synchronization of multiple paper machine drive units.
Metal smelting and rolling plants: Connecting multiple power units in large cold/hot rolling mills.
Wind power plants: Extending control signals in the frequency converter control cabinet of wind turbines.
Large material handling plants: Distributed communication of multiple frequency converters in long-distance conveyor belt systems.
General notes
• DC drives (e.g. DCS 600 products) use 10 MBd optical transmitters/receivers.
• ACS 600 products use 5 MBd as well as 10 MBd optical transmitters/receivers.
• Mechanically both types are identical i.e accept the same cable connectors.
• Mixing 5 MBd and 10 MBd is not possible.
• With 5 MBd optical components only plastic optical fibre cable (POF) can be used.
FAQ
Q: What is the special meaning of the "C" suffix in NDBU-85C?
A: "C" indicates that the circuit board has undergone conformal coating treatment, making it suitable for corrosive or high-humidity environments such as chemical plants and marine environments.
Q: Why are some channel LEDs not blinking about NDBU-85C?
A: If a channel is in use but not blinking, it usually means there is a missing optical signal. Please check if the fiber optic cable is damaged or if the peer device is powered on.
Q: Can NDBU-85C be used interchangeably with NDBU-95 on the same network?
A: Yes. They are from the same product series, but note that NDBU-95 has additional communication modes (such as REGEN mode) and higher speed support.
Q: Why can't the address I set be recognized by DriveWindow software about NDBU-85C?
A: Ensure the address is between 76 and 124, and the address value of the unit closer to the host computer (PC) should be larger.
Q: What is its maximum communication distance about NDBU-85C?
A: Using POF fiber optic cables, the distance is typically within 20-30 meters; using HCS cables and specific setups, the distance can be extended to 50-200 meters.
